As is known to all, the success of a person needs the right guidance and interest is undoubtedly the best teacher. Even Albert Einstein, the world-renowned physicist, said, “I have no special talents. I am only passionately curious.” So it is high time that people explore and cultivate their own interest. Passionate curiosity can be developed in one’s childhood or in one’s sixties, but once it is ignited, it can change people’s way of study, work and living. On the one hand, interest makes on...